2 #define I3__FILE__ "startup.c"
4 * vim:ts=4:sw=4:expandtab
6 * i3 - an improved dynamic tiling window manager
7 * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
9 * startup.c: Startup notification code. Ensures a startup notification context
10 * is setup when launching applications. We store the current
11 * workspace to open windows in that startup notification context on
12 * the appropriate workspace.
16 #include "sd-daemon.h"
18 #include <sys/types.h>
22 #define SN_API_NOT_YET_FROZEN 1
23 #include <libsn/sn-launcher.h>
25 static TAILQ_HEAD(startup_sequence_head, Startup_Sequence) startup_sequences =
26 TAILQ_HEAD_INITIALIZER(startup_sequences);
29 * After 60 seconds, a timeout will be triggered for each startup sequence.
31 * The timeout will just trigger completion of the sequence, so the normal
32 * completion process takes place (startup_monitor_event will free it).
35 static void startup_timeout(EV_P_ ev_timer *w, int revents) {
36 const char *id = sn_launcher_context_get_startup_id(w->data);
37 DLOG("Timeout for startup sequence %s\n", id);
39 struct Startup_Sequence *current, *sequence = NULL;
40 TAILQ_FOREACH(current, &startup_sequences, sequences) {
41 if (strcmp(current->id, id) != 0)
48 /* Unref the context (for the timeout itself, see start_application) */
49 sn_launcher_context_unref(w->data);
52 DLOG("Sequence already deleted, nevermind.\n");
56 /* Complete the startup sequence, will trigger its deletion. */
57 sn_launcher_context_complete(w->data);
62 * Some applications (such as Firefox) mark a startup sequence as completed
63 * *before* they even map a window. Therefore, we cannot entirely delete the
64 * startup sequence once it’s marked as complete. Instead, we’ll mark it for
65 * deletion in 30 seconds and use that chance to delete old sequences.
67 * This function returns the number of active (!) startup notifications, that
68 * is, those which are not marked for deletion yet. This is used for changing
69 * the root window cursor.
72 static int _prune_startup_sequences(void) {
73 time_t current_time = time(NULL);
74 int active_sequences = 0;
76 /* Traverse the list and delete everything which was marked for deletion 30
77 * seconds ago or earlier. */
78 struct Startup_Sequence *current, *next;
79 for (next = TAILQ_FIRST(&startup_sequences);
80 next != TAILQ_END(&startup_sequences);
83 next = TAILQ_NEXT(next, sequences);
85 if (current->delete_at == 0) {
90 if (current_time <= current->delete_at)
93 startup_sequence_delete(current);
96 return active_sequences;
101 * Deletes a startup sequence, ignoring whether its timeout has elapsed.
102 * Useful when e.g. a window is moved between workspaces and its children
103 * shouldn't spawn on the original workspace.
106 void startup_sequence_delete(struct Startup_Sequence *sequence) {
107 assert(sequence != NULL);
108 DLOG("Deleting startup sequence %s, delete_at = %ld, current_time = %ld\n",
109 sequence->id, sequence->delete_at, time(NULL));
111 /* Unref the context, will be free()d */
112 sn_launcher_context_unref(sequence->context);
114 /* Delete our internal sequence */
115 TAILQ_REMOVE(&startup_sequences, sequence, sequences);
118 free(sequence->workspace);
123 * Starts the given application by passing it through a shell. We use double fork
124 * to avoid zombie processes. As the started application’s parent exits (immediately),
125 * the application is reparented to init (process-id 1), which correctly handles
126 * childs, so we don’t have to do it :-).
128 * The shell is determined by looking for the SHELL environment variable. If it
129 * does not exist, /bin/sh is used.
131 * The no_startup_id flag determines whether a startup notification context
132 * (and ID) should be created, which is the default and encouraged behavior.
135 void start_application(const char *command, bool no_startup_id) {
136 SnLauncherContext *context;
138 if (!no_startup_id) {
139 /* Create a startup notification context to monitor the progress of this
141 context = sn_launcher_context_new(sndisplay, conn_screen);
142 sn_launcher_context_set_name(context, "i3");
143 sn_launcher_context_set_description(context, "exec command in i3");
144 /* Chop off everything starting from the first space (if there are any
145 * spaces in the command), since we don’t want the parameters. */
146 char *first_word = sstrdup(command);
147 char *space = strchr(first_word, ' ');
150 sn_launcher_context_initiate(context, "i3", first_word, last_timestamp);
153 /* Trigger a timeout after 60 seconds */
154 struct ev_timer *timeout = scalloc(sizeof(struct ev_timer));
155 ev_timer_init(timeout, startup_timeout, 60.0, 0.);
156 timeout->data = context;
157 ev_timer_start(main_loop, timeout);
159 LOG("startup id = %s\n", sn_launcher_context_get_startup_id(context));
161 /* Save the ID and current workspace in our internal list of startup
163 Con *ws = con_get_workspace(focused);
164 struct Startup_Sequence *sequence = scalloc(sizeof(struct Startup_Sequence));
165 sequence->id = sstrdup(sn_launcher_context_get_startup_id(context));
166 sequence->workspace = sstrdup(ws->name);
167 sequence->context = context;
168 TAILQ_INSERT_TAIL(&startup_sequences, sequence, sequences);
170 /* Increase the refcount once (it starts with 1, so it will be 2 now) for
171 * the timeout. Even if the sequence gets completed, the timeout still
172 * needs the context (but will unref it then) */
173 sn_launcher_context_ref(context);
176 LOG("executing: %s\n", command);
180 setrlimit(RLIMIT_CORE, &original_rlimit_core);
181 /* Close all socket activation file descriptors explicitly, we disabled
182 * FD_CLOEXEC to keep them open when restarting i3. */
183 for (int fd = SD_LISTEN_FDS_START;
184 fd < (SD_LISTEN_FDS_START + listen_fds);
188 unsetenv("LISTEN_PID");
189 unsetenv("LISTEN_FDS");
190 signal(SIGPIPE, SIG_DFL);
192 /* Setup the environment variable(s) */
194 sn_launcher_context_setup_child_process(context);
196 execl(_PATH_BSHELL, _PATH_BSHELL, "-c", command, (void*)NULL);
203 if (!no_startup_id) {
204 /* Change the pointer of the root window to indicate progress */
205 if (xcursor_supported)
206 xcursor_set_root_cursor(XCURSOR_CURSOR_WATCH);
207 else xcb_set_root_cursor(XCURSOR_CURSOR_WATCH);
212 * Called by libstartup-notification when something happens
215 void startup_monitor_event(SnMonitorEvent *event, void *userdata) {
216 SnStartupSequence *snsequence;
218 snsequence = sn_monitor_event_get_startup_sequence(event);
220 /* Get the corresponding internal startup sequence */
221 const char *id = sn_startup_sequence_get_id(snsequence);
222 struct Startup_Sequence *current, *sequence = NULL;
223 TAILQ_FOREACH(current, &startup_sequences, sequences) {
224 if (strcmp(current->id, id) != 0)
232 DLOG("Got event for startup sequence that we did not initiate (ID = %s). Ignoring.\n", id);
236 switch (sn_monitor_event_get_type(event)) {
237 case SN_MONITOR_EVENT_COMPLETED:
238 DLOG("startup sequence %s completed\n", sn_startup_sequence_get_id(snsequence));
240 /* Mark the given sequence for deletion in 30 seconds. */
241 time_t current_time = time(NULL);
242 sequence->delete_at = current_time + 30;
243 DLOG("Will delete startup sequence %s at timestamp %ld\n",
244 sequence->id, sequence->delete_at);
246 if (_prune_startup_sequences() == 0) {
247 DLOG("No more startup sequences running, changing root window cursor to default pointer.\n");
248 /* Change the pointer of the root window to indicate progress */
249 if (xcursor_supported)
250 xcursor_set_root_cursor(XCURSOR_CURSOR_POINTER);
251 else xcb_set_root_cursor(XCURSOR_CURSOR_POINTER);
261 * Gets the stored startup sequence for the _NET_STARTUP_ID of a given window.
264 struct Startup_Sequence *startup_sequence_get(i3Window *cwindow,
265 xcb_get_property_reply_t *startup_id_reply, bool ignore_mapped_leader) {
266 /* The _NET_STARTUP_ID is only needed during this function, so we get it
267 * here and don’t save it in the 'cwindow'. */
268 if (startup_id_reply == NULL || xcb_get_property_value_length(startup_id_reply) == 0) {
269 FREE(startup_id_reply);
270 DLOG("No _NET_STARTUP_ID set on window 0x%08x\n", cwindow->id);
271 if (cwindow->leader == XCB_NONE)
274 /* This is a special case that causes the leader's startup sequence
275 * to only be returned if it has never been mapped, useful primarily
276 * when trying to delete a sequence.
278 * It's generally inappropriate to delete a leader's sequence when
279 * moving a child window, but if the leader has no container, it's
280 * likely permanently unmapped and the child is the "real" window. */
281 if (ignore_mapped_leader && con_by_window_id(cwindow->leader) != NULL) {
282 DLOG("Ignoring leader window 0x%08x\n", cwindow->leader);
286 DLOG("Checking leader window 0x%08x\n", cwindow->leader);
288 xcb_get_property_cookie_t cookie;
290 cookie = xcb_get_property(conn, false, cwindow->leader,
291 A__NET_STARTUP_ID, XCB_GET_PROPERTY_TYPE_ANY, 0, 512);
292 startup_id_reply = xcb_get_property_reply(conn, cookie, NULL);
294 if (startup_id_reply == NULL ||
295 xcb_get_property_value_length(startup_id_reply) == 0) {
296 FREE(startup_id_reply);
297 DLOG("No _NET_STARTUP_ID set on the leader either\n");
303 if (asprintf(&startup_id, "%.*s", xcb_get_property_value_length(startup_id_reply),
304 (char*)xcb_get_property_value(startup_id_reply)) == -1) {
305 perror("asprintf()");
306 DLOG("Could not get _NET_STARTUP_ID\n");
307 free(startup_id_reply);
311 struct Startup_Sequence *current, *sequence = NULL;
312 TAILQ_FOREACH(current, &startup_sequences, sequences) {
313 if (strcmp(current->id, startup_id) != 0)
321 DLOG("WARNING: This sequence (ID %s) was not found\n", startup_id);
323 free(startup_id_reply);
328 free(startup_id_reply);
334 * Checks if the given window belongs to a startup notification by checking if
335 * the _NET_STARTUP_ID property is set on the window (or on its leader, if it’s
338 * If so, returns the workspace on which the startup was initiated.
339 * Returns NULL otherwise.
342 char *startup_workspace_for_window(i3Window *cwindow, xcb_get_property_reply_t *startup_id_reply) {
343 struct Startup_Sequence *sequence = startup_sequence_get(cwindow, startup_id_reply, false);
344 if (sequence == NULL)
347 /* If the startup sequence's time span has elapsed, delete it. */
348 time_t current_time = time(NULL);
349 if (sequence->delete_at > 0 && current_time > sequence->delete_at) {
350 DLOG("Deleting expired startup sequence %s\n", sequence->id);
351 startup_sequence_delete(sequence);
355 return sequence->workspace;